conf = require("../config")
if not conf.lint.enabled then return {} end

local linter = {
  "ruff",         -- python
}

vim.api.nvim_create_autocmd("User", {
  pattern = "LazyDone",
  group = vim.api.nvim_create_augroup('nvim-linter', {clear = true}),
  callback = function()
    if has_lint then
      local mr = require("mason-registry")
      mr:on("package:install:success", function()
        vim.defer_fn(function()
          -- trigger FileType event to possibly load this newly installed LSP server
          require("lazy.core.handler.event").trigger({
            event = "FileType",
            buf = vim.api.nvim_get_current_buf(),
          })
        end, 100)
      end)

      mr.refresh(function()
        for _, tool in ipairs(linter) do
          local p = mr.get_package(tool)
          if not p:is_installed() then
            p:install()
          end
        end
      end)
    end
  end
})

return {
  "mfussenegger/nvim-lint",
  event = { 'BufReadPost', 'BufNewFile' },
  opts = {
    -- Event to trigger linters
    events = { "BufWritePost", "BufReadPost", "InsertLeave" },
    linters_by_ft = {
      verilog = { "svlint" },
      systemverilog = { "svlint" },
      python = { "ruff" }
      -- Use the "*" filetype to run linters on all filetypes.
      -- ['*'] = { 'global linter' },
      -- Use the "_" filetype to run linters on filetypes that don't have other linters configured.
      -- ['_'] = { 'fallback linter' },
      -- ["*"] = { "typos" },
    },
    ---@type table<string,table>
    linters = {
      -- -- Example of using selene only when a selene.toml file is present
      -- selene = {
      --   -- `condition` is another LazyVim extension that allows you to
      --   -- dynamically enable/disable linters based on the context.
      --   condition = function(ctx)
      --     return vim.fs.find({ "selene.toml" }, { path = ctx.filename, upward = true })[1]
      --   end,
      -- },
      svlint = {},
    },
  },
  config = function(_, opts)
    local M = {}

    local lint = require("lint")
    for name, linter in pairs(opts.linters) do
      if type(linter) == "table" and type(lint.linters[name]) == "table" then
        lint.linters[name] = vim.tbl_deep_extend("force", lint.linters[name], linter)
        if type(linter.prepend_args) == "table" then
          lint.linters[name].args = lint.linters[name].args or {}
          vim.list_extend(lint.linters[name].args, linter.prepend_args)
        end
      else
        lint.linters[name] = linter
      end
    end
    lint.linters_by_ft = opts.linters_by_ft

    function M.debounce(ms, fn)
      local timer = vim.uv.new_timer()
      return function(...)
        local argv = { ... }
        timer:start(ms, 0, function()
          timer:stop()
          vim.schedule_wrap(fn)(unpack(argv))
        end)
      end
    end

    function M.lint()
      -- Use nvim-lint's logic first:
      -- * checks if linters exist for the full filetype first
      -- * otherwise will split filetype by "." and add all those linters
      -- * this differs from conform.nvim which only uses the first filetype that has a formatter
      local names = lint._resolve_linter_by_ft(vim.bo.filetype)

      -- Create a copy of the names table to avoid modifying the original.
      names = vim.list_extend({}, names)

      -- Add fallback linters.
      if #names == 0 then
        vim.list_extend(names, lint.linters_by_ft["_"] or {})
      end

      -- Add global linters.
      vim.list_extend(names, lint.linters_by_ft["*"] or {})

      -- Filter out linters that don't exist or don't match the condition.
      local ctx = { filename = vim.api.nvim_buf_get_name(0) }
      ctx.dirname = vim.fn.fnamemodify(ctx.filename, ":h")
      names = vim.tbl_filter(function(name)
        local linter = lint.linters[name]
        if not linter then
          vim.notify_once("Linter not found: " .. name, vim.log.levels.WARN, {title = "nvim-lint"})
        end
        return linter and not (type(linter) == "table" and linter.condition and not linter.condition(ctx))
      end, names)

      -- Run linters.
      if #names > 0 then
        lint.try_lint(names)
      end
    end

    vim.api.nvim_create_autocmd(opts.events, {
      group = vim.api.nvim_create_augroup("nvim-lint", { clear = true }),
      callback = M.debounce(100, M.lint),
    })
  end,
}

